<!-- components/ToastMessage.vue -->
<template>
  <Teleport to="body">
    <!-- 遮罩层（可选） -->
    <div
      v-if="visible || isLeaving"
      class="toast-mask"
      :class="{ 'mask-active': visible && !isLeaving }"
    ></div>

    <!-- Toast内容 -->
    <div
      v-if="visible || isLeaving"
      class="toast-wrapper"
      :class="[
        `toast-${position}`,
        { 'toast-active': visible && !isLeaving, 'toast-leave': isLeaving },
      ]"
    >
      <div class="toast-content">
        {{ message }}
      </div>
    </div>
  </Teleport>
</template>
  
  <script>
export default {
  name: "ToastMessage",
  props: {
    message: {
      type: String,
      required: true,
    },
    duration: {
      type: Number,
      default: 2000,
    },
    position: {
      type: String,
      default: "center", // top | center | bottom
      validator: (val) => ["top", "center", "bottom"].includes(val),
    },
  },
  data() {
    return {
      visible: false,
      isLeaving: false,
    };
  },
  emits: ["closed"],
  mounted() {
    setTimeout(() => {
      this.visible = true;
      this.autoClose();
    }, 50);
  },
  methods: {
    autoClose() {
      setTimeout(() => {
        this.startLeaveAnimation();
      }, this.duration);
    },
    startLeaveAnimation() {
      this.isLeaving = true;
      setTimeout(() => {
        this.visible = false;
        this.isLeaving = false;
        this.$emit("closed");
      }, 300);
    },
  },
};
</script>
  
  <style scoped>
/* 基础动画 */
.toast-wrapper {
  position: fixed;
  left: 50%;
  opacity: 0;
  transform: translateX(-50%);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2000;
  will-change: transform, opacity;
}

/* 不同位置 */
.toast-top {
  top: 20px;
  transform: translateX(-50%) translateY(-20px);
}

.toast-center {
  top: 50%;
  transform: translate(-50%, -50%) translateY(20px);
}

.toast-bottom {
  bottom: 20px;
  transform: translateX(-50%) translateY(20px);
}

/* 激活状态 */
.toast-active {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast-center.toast-active {
  transform: translate(-50%, -50%) translateY(0);
}

/* 离开动画 */
.toast-leave {
  opacity: 0;
  transform: translateX(-50%) translateY(-20px);
  transition: all 0.2s ease-in;
}

.toast-center.toast-leave {
  transform: translate(-50%, -50%) translateY(20px);
}

.toast-bottom.toast-leave {
  transform: translateX(-50%) translateY(20px);
}

/* 内容样式 */
.toast-content {
  padding: 22px 40px;
  background: var(--bs-bg-color);
  color: var(--bs-link-color);
  border-radius: 4px;
  font-size: 14px;
  line-height: 1.5;
  max-width: 70vw;
  word-break: break-word;
  box-shadow: rgba(0, 0, 0, 0.1) 0px 4px 12px;
  border: var(--bs-theme-color) 2px solid;
}

/* 遮罩层（如果需要带遮罩的toast） */
.toast-mask {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(2px);
  transition: opacity 0.3s;
  z-index: 1999;
}

.toast-mask.mask-active {
  background-color: rgba(255,255,255,.3);
  opacity: 1;
}
</style>